Steam boiler



W. F. KIESEL, In.

STEAM BQILER. V APPLICATION FILED NOV. I I9I8.

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W. F. KIESEL, JR.

STEAM BOILER. APPLICATION FILED-NOV. l, 1918.

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M//T/vEsS W. F; KIESEL, In

STEAM BOILER. APPLLCATION FILED Nov. l, 191s.

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i WILLIAM `r.,V irinsnnjart., or iinroone,` rnnnsxnvanra.

ernaar nomina.

Application. iledhovcmber l, 1918. Serial No. 260,670.

`To all whom t 'may concern: Y

"Be it known that` l, `WILLIAM F; Kissen,

` Jr., a citizen of the United tates, and residnient;

ing at Altoona, county of Bla-ir` aiidtateof Pennsylvania, have inventedcertain ,new

"and useful lmprovements in Steam `Boilers,

ofwhich the followingis a specification. Y t `My `invention relates tothat class of boilers in which the water space 'is between an outershell and an innershell containing the fire box and they combustionchamber, and my invention consistsin means for neutralizing the strainswhich would otherwise result from longitudinal expansion and contractionof the inner shell and also in limiting by such means the `area ofcommunica "tion between 'the ire box and the combustion chamber, and inthe constructionof the parts las fully set forth hereinafter, and asillus trat-ed in the i accompanying drawing, in which t Fig. l is alongitudinal section of part of a locomotive boiler illustrating my`improve Fig. 2 is a and Fig.`3 is a perspective view in part sectionillustrating a particular construction of the distensible connectingmember between `the section on the line 2, 2, Fig. l.;

two sections of the inner shell of the boiler. i

The boiler may be of any usual construc- `tion having an'internal shell,the longitudi- `nal expansion and contraction of `which is desiredfto beneutralized, and `as shown in the drawing is a locomotive boiler `havingan outer shell A and an inner shell B with `the water space betweenthetwo, the inner shell containing there `box so and combustion chambery. i

Between the two sections of the inner shell,

l interpose a distensible member C which is ofiplate metal folded so asto produce transversely a hollow ll-shaped rib 3 and side flanges 4, 5,which maybe riveted to the adjacent ends of the shell section,` asshown. llhe folded portion or hollow rib 3 is transversely distensible,that is, the sides `can" separateor be brought together as au result ofany contractionor elongation of theshell sections, thereby compensatingfor these` changes and preventing the` strains which would otherwiseoccur. s i

The inner shell is in two sections, the front section containing` thecombustion chamber and the rear section constituting the sidesf `and topofthe fire box. t i

llt is desirable in manyinstances to con-v tract the passage between thetire chamber and the combustion chamber and insuch case v r the rib"3`isarranged to extendinward. As

shown,- the lower portion projects inward to a greater extent thantheupper, forming in i effect a bridge wall.`

` While "the member C may vary in the form, arrangement and proportionof the parts' somewhat, l prefer the `construction shown in the drawingswhere the lower portion of the `member at the rear extends downward to apoint below the level of the grate bars and wholly across the fire-boxforming therear face w of the latterwith side `flanges d, l for boltingto the sides of the t shell, while the forward portionof the memberextends downward to a less extent than the rear portion and is bentforward to form a `flange 5` for bolting to the rear end of the shell ofthe combustion chamber, and thel mud ring 6 is bolted between the loweredge of the rear portion of the member C and a flange of the outer shellA `of theboiler, as

.along the lines S, S, Fig. 2, constitute a member in oneccontinuouspiece. The upper section of the expansion device may therefore bedescribed as a lll-shaped expansion element comprising a hollow rib orcorrugation extending from end to end of said element and havingoppositely Vprojecting lateral anges. `The lower element comprises avertical front wall 'w having lateral langesll:

at its vertical ends, a rearv wall of less height than 4the front wallhaving a flange `5 at its bottom edge and a semicircular wall connectingthe tops of said front and rear walls.

Although a, specific embodiment ofthe invention has been described indetail it is to be understood that the invention is not thus limited butincludesV modifications .and l changes which come within the scope ofthe" appended claims.

Without limiting myself to the constructionv and arrangement of partsshown, I claim:

l. An expansion member for connecting the shell sections of a boilercontaining jche re box and vCombustion Chamber eonsiting' offwo parteWelded together, one formed of a strip bent transversely to ineke ehollow riband Side flanges, and 'the other bent to form a Continuationof seid hollow rib and.

' flanges and extending downward nnfl tranevversely at one side/toconstitute the vfront end. of the lire box, substantially ne set. forth.2. en article of manufacture, an arch shaped expansion @lenient for thefir i-bof; of

connecting` the tops of Suid frontI und rear Walls.

ln i locomotive boiler having :L fire-box and a. combustion elnunber,:in expnneion leviee connecting the inner shells of said firebox andQhzunber comprisingl :in upper parta and :L lower part Weldedl thereto,ssiirl upper part Consisting of zi, strip haring :l hollow rib oreorrugzition extending from end to end und having oppositely projectinglateral i'langee; seid lower part comprising :in :irrh shaped elementincluding :i rertirzil front will haring flanges :it its vertical ende,:i rear will of less height', than the front will having flange it itsbottom edge. und :i Curved wall connecting the tope of said fromy andrear walls.

ln testinionv whereof l :i'lix my signnfiire.

WiLLIAM F. iiiiiicsnii, JR.

